Anyways, this is just another tvtropes post. I know, depressing... or maybe not. Anyways, this trope is called After Action, Villain Analysis.
"Burns became consumed by greed, he'd steal from anyone . . .
and when he tried to steal our sunlight, he crossed the line from everyday villainy into Cartoonish Supervillainy!"— Smithersnote , The Simpsons, "Who Shot Mr. Burns, Part 2""He learned almost too late that man is a feeling creature, and because of it, the greatest in the universe..."
This is when either an enemy of a major villain, or maybe a minion who turned against them, explains to others the nature of their conflict, typically when the villain is not around, likely after the villain has either been defeated or is at least temporarily out of power. An alternative title for this, "explaining the villain explains the conflict," refers to the notion that explaining what happened makes the actions of the villain's enemy or former rival more understandable.
Note that this is not a Motive Rant; the tone of the conversation will be very calm and gentle despite the subject matter, as indicated by many of the examples...
Compare Kirk Summation, which is addressed to the actual villain. See also You're Insane!.
Not to be confused with How We Got Here.